If you're able to come up with other good categories for this game, then there's a good chance they will get added. The problem is that besides marriage, there aren't that many other "good" options besides a couple of the ones you mentioned. Honestly, the best thing to do is to just run a category you think would be cool, and then once you have a run, the category will most likely be added to the leaderboards.

Upgrading all tools to maximum might be a lot longer task than marriage. At least if you count the Cursed/Blessed/Mythic upgrades into the run.

Getting all power berries might be a bit faster than marriage% if routed correctly.

For shorter categories an interesting option might be some kind of "capitalist%" with some subcategories like reaching 50k, 100k, etc. gold as fast as possible. The rule for "time end" could be "If you open the menu and it says >= 50k/100k/... then do the final split".

Well I ran all Power Berries... and its really long. Ill look into other runs however.

Instead of a new category, I'd like to vouch for HM: More Friends of Mineral Town to be a runnable GBA game on this site, as the marriage candidates in that game also have their own different likes, dislikes, schedules, and story. Just a thought, as I have no idea how one would go about creating a new game on this website to run. If it were here, however, I'd gladly participate.

More friends of mineral town, and a mrriage category for each candidate has been added.

Just added a misc category that should fall in a suitable range of time.